Dual decoder portable media device

ABSTRACT

A portable media device  100  including two onboard hardware media decoders ( 124, 128 ) operative to decode a given digital content item  148  is provided. In some embodiments, one of the onboard hardware media decoders  128  has a relatively high power consumption and produces a relatively ‘high quality’ media signal, and the other of the onboard hardware media decoder  124  has a relatively low power consumption and produces a relatively ‘low quality’ media signal. In one non-limiting use case: (i) when no external power is available, the relatively ‘low power’ hardware media decoder  124  may generate a relatively ‘low quality’ media signal which is presented on an onboard display screen  140   a  and/or onboard speaker  140   b;  and (ii) when external power is available, the relatively ‘high power’ hardware media decoder  128  may generate a relatively ‘high quality’ media signal which is exported out of the portable media device  100  via one or more media ports, and presented on an external host presentation device  160  (for example, a large-screen television).

CROSS-REFERENCE TO RELATED APPLICATIONS

This patent application claims the benefit of U.S. Provisional PatentApplication No. 60/917,680 filed May 14, 2007 by the present inventors.

This application is related to U.S. patent application Ser. No.12/120,253 of the same inventors, which is entitled “METHODS OFOPERATING A DUAL DECODER PORTABLE MEDIA DEVICE” and filed on the sameday as the present application. The latter application, also claimingpriority from U.S. Provisional Patent Application No. 60/917,680 isincorporated in its entirety as if fully set forth herein.

FIELD OF THE INVENTION

The present invention relates to a portable media device.

BACKGROUND AND RELATED ART

Portable multimedia players are well known in the art and are designedto convert a digital file, stored on a magnetic medium or in flashmemory, into streaming video and audio. Typically, portable multimediaplayers include an onboard screen for presenting the video stream, andat least one of (i) an onboard speaker for ‘presenting’ the audio streamand/or (ii) an audio media port for exporting the audio stream (forexample, to headphones).

One salient feature of portable multimedia players is their relativelylow power consumption, which allows users to listen to view movies usingpower provided by an onboard internal battery. To achieve this low powerconsumption, portable multimedia players are designed to save as muchenergy as possible, and their electronics are tightly designed forpresenting video on a small display and at relatively low quality. Inaddition, some portable multimedia players also provide an output plug,which may be plugged into a media input port of a large screen (forexample, a television), if available. This enables display of the ‘lowquality video, which is generated internally within the portablemultimedia player, on the large screen.

It would be very much desired and appreciated by electronicentertainment consumers to have a pocket-sized portable media devicethat is capable of generating and exporting a ‘higher quality’ mediasignal to an external screen and/or speaker.

SUMMARY OF EMBODIMENTS OF THE INVENTION

Various embodiments address these and related issues, examples of whichembodiments, including methods and systems, are provided herein.

It is now disclosed for the first time a portable media device fordecoding a given digital content item. The portable media devicecomprises: a) a device housing; b) a first onboard hardware mediadecoder associated with the device housing, the first onboard hardwaremedia decoder operative to decode the given digital content item togenerate a first media signal; c) a second onboard hardware mediadecoder associated with the device housing, the second onboard hardwaremedia decoder operative to decode the given digital content item togenerate a second media signal; and d) a media output port mechanicallyintegrated with the device housing for exporting at least one of thegenerated media signals.

According to some embodiments, the portable media device furthercomprises: e) exactly one onboard display screen mechanically integratedwith the device housing for displaying the first media signal, wherein:i) the onboard display screen is operatively coupled to the firstonboard hardware media decoder without being operatively coupled to thesecond onboard hardware media decoder; and ii) the media output port isoperatively coupled to the second onboard hardware media decoder toexport the second media signal; and iii) the first onboard hardwaremedia decoder is configured within the portable media device such thatno output media signal from the first onboard hardware media decoder maybe exported from the portable media device to any external device.

According to some embodiments, a ratio between a power consumption ofthe second hardware media decoder and a power consumption of the firsthardware media decoder is at least 2.

According to some embodiments, the portable media device furthercomprises: e) an onboard power source for powering the first hardwaremedia decoder wherein: i) the media output port is a multi-function portthat is also operative for receiving electrical power; and ii) operationof the second hardware media decoder is contingent upon an availabilityof external power via the media output port.

According to some embodiments, i) the first hardware media decoder is ahardware video decoder that is operative such that the first mediasignal is a first video signal; ii) the second hardware media decoder isa hardware video decoder that is operative such that the second mediasignal is a second video signal; and iii) the first and second hardwaremedia decoders are configured such that at least one video qualityrelation selected from the group consisting of a first video qualityrelation and a second video quality relation is true; and iv) the firstand second video quality relations are defined as follows: A) accordingto the first video quality relation, a ratio between a total number ofpixels of a video image of the first video signal and a total number ofpixels of a video image of the second video signal is at most 1/3; andB) according to the second video quality relation, a ratio between acolor depth of a video image of the first video signal and a color depthof video image of the second video signal is at least 1.5.

According to some embodiments, i) the first hardware media decoder is ahardware streaming video decoder that is operative such that the firstmedia signal is a first video stream; ii) the second hardware mediadecoder is a hardware streaming video decoder that is operative suchthat the second media signal is a second video stream; and iii) a ratiobetween a frame refresh rate of the first video stream and a refreshrate of the second video stream is at most 1/2.

According to some embodiments, i) the first and second hardware mediadecoders are operative so that at least one operation condition selectedfrom the group consisting of a first operation condition and a secondoperation condition is true; and ii) the first and second operationscondition are defined as follows: A) according to the first operationcondition, the first and second hardware media decoders are operative torespectively generate the first and second media signals from the givendigital media content item simultaneously; and B) according to thesecond operation condition, one of the first and second hardware mediadecoders is operative to effect a respective decoding at a time when theother of the first and second hardware media decoder is dormant.

According to some embodiments, i) the first and second hardware mediadecoders are operative so that at least one operation condition selectedfrom the group consisting of a first operation condition and a secondoperation condition is true; and ii) the first and second operationscondition are defined as follows: A) according to the first operationcondition, at least one of the first media signal and the second mediasignal is a static video signal; and B) according to the secondoperation condition, each of the first hardware media decoder and thesecond hardware media decoder is hardware streaming media decoder.

According to some embodiments, i) the first hardware media decoder is ahardware streaming video decoder that is operative such that the firstmedia signal is a first video stream; ii) the second hardware mediadecoder is a hardware streaming video decoder that is operative suchthat the second media signal is a second video stream; and iii) thefirst hardware media decoder and the second hardware media decoder areconfigured to effect the respective decodings so that the first andsecond video streams are synchronized playback streams of the givencontent item.

According to some embodiments, i) the first hardware media decoder is ahardware streaming video decoder that is operative such that the firstmedia signal is a first video stream; ii) the second hardware mediadecoder is a hardware streaming video decoder that is operative suchthat the second media signal is a second video stream; and iii) thedevice further comprises: e) a user control for controlling a timedifference between the first and second playbacks.

According to some embodiments, i) the device further comprises: e) anonboard media presentation device mechanically integrated with thedevice housing; and ii) the second hardware media decoder and the mediaoutput port are configured within the portable media device to respondto an inter-device coupling via the media port that occurs at a timewhen: A) the first hardware media decoder is decoding the given digitalmedia content item to generate the first media signal from the digitalmedia content item, and B) the onboard display presentation device ispresenting the first media signal, by: I) commencing the decoding of thegiven digital media content item by the second hardware media decoder togenerate the second media signal; and II) commencing the exporting viathe media output port of the second media signal. According to someembodiments, the first hardware media decoder and the onboard mediapresentation device are configured within the portable media device torespond to the inter-device coupling by ceasing at least one of i) thedecoding of the digital content item by the first hardware mediadecoder; and ii) the presenting of the first media signal by the onboardmedia presentation device.

According to some embodiments, the first hardware media decoder and theonboard media presentation device are configured within the portablemedia device to continue: i) the decoding of the digital content item bythe first hardware media decoder; and ii) the presenting of the firstmedia signal by the onboard media presentation device after thecommencing of the decoding of the given digital content item by thesecond hardware media decoder which occurs after the inter-devicecoupling.

According to some embodiments, the second hardware media decoder isoperative to commence the decoding of the given content item inaccordance with a streaming media playback bookmark of the firsthardware media decoder.

According to some embodiments, the first hardware media decoder and thesecond hardware media decoder are operative to simultaneously effect aplayback of the given digital content item in a manner such that thesecond media signal provides at least one of: i) a look-aheadfunctionality relative to the first media signal; ii) a look-aheadfunctionality relative to the first media signal; and iii) a flexibletime domain relative to the first media signal.

According to some embodiments, i) the portable media device furthercomprises: e) a media presentation device mechanically integrated withthe device housing; and ii) the first hardware media decoder, theonboard media presentation device, the second hardware media decoder andthe media output port are configured within the portable media device torespond to an inter-device decoupling via the media port that occurs ata time when: A) the second hardware media decoder is decoding the givendigital media content item to generate the second media signal from thedigital media content item; and B) the media output port is exportingthe second media signal, by I)ceasing the decoding of the digital mediacontent item by the second hardware media decoder; and II)commencing thedecoding of the digital media content item by the first hardware mediadecoder to generate the first media signal and the presenting of thefirst media signal on the onboard display screen.

According to some embodiments, i) the portable media device furthercomprises: e) an onboard display screen mechanically integrated with thedevice housing; and ii) the first hardware media decoder, the onboarddisplay screen, the second hardware media decoder and the media outputport are configured within the portable media device to respond to aninter-device decoupling via the media port that occurs at a time when:A) the second hardware media decoder is decoding the given digital mediacontent item to generate the second media signal from the digital mediacontent item; B) the media output port is exporting the second mediasignal, C) the first hardware media decoder is decoding the givendigital media content item to generate the first media signal from thedigital media content item; and D) the onboard display screen ispresenting the first media signal, by: I)ceasing the second digitalmedia playback of the digital media content item by the second hardwaremedia decoder; and II)continuing the first digital media playback of thedigital media content item by the first hardware media decoder togenerate the first video stream and the presenting of the first media onthe onboard display screen.

According to some embodiments, i) the portable media device furthercomprises: g) a user control for effecting a mode transition between anyof a first mode, a second mode and a third mode; and ii) the first,second and third modes are defined as follows: A) when in the firstmode, the first hardware media decoder is active and the second hardwaremedia decoder is dormant; B) when in the second mode, the secondhardware media decoder is active and the first hardware media decoder isdormant; and C) when in the third mode, both of the first hardware mediadecoder is active and the second hardware media decoder are active.

It is now disclosed for the first time a portable media devicecomprising: a) a first onboard hardware media decoder; b) a secondonboard hardware media decoder; and c) control circuitry operative to:i) determine if external available power is available to the portablemedia device; ii) if the external power is available, activating thesecond onboard hardware media decoder; and iii) otherwise, if theexternal power is not available, activating the first onboard hardwaremedia decoder without activating the second onboard hardware mediadecoder.

According to some embodiments, a ratio between a power consumption ofthe second hardware media decoder and a power consumption of the firsthardware media decoder is at least 2.

According to some embodiments, i) the first hardware media decoder is ahardware streaming video decoder that is operative to generate a firstvideo stream; ii) the second hardware media decoder is a hardwarestreaming video decoder that is operative to generate a first videostream; and iii) the first and second hardware media decoders areconfigured such that at least one video quality relation selected fromthe group consisting of a first video quality relation, a second videoquality relation and a third video quality relation is true; and iv) thefirst, second and third video quality relations are defined as follows:A) according to the first video quality relation, a ratio between atotal number of pixels of a video image of the first video stream and atotal number of pixels of a video image of the second video stream is atmost 1/3; B) according to the second video quality relation, a ratiobetween a frame refresh rate of the first video stream and a refreshrate of the second video stream is at most 1/2; and C) according to thethird video quality relation, a ratio between a color depth of the firstvideo stream and a color depth of the second video stream is at least1.5.

It is now disclosed for the first time a method of operating a mediadevice having a first onboard hardware media decoder and a secondonboard hardware media decoder, the method comprising: a) determining ifexternal available power is available to the media device; b) if theexternal power is available, activate the second onboard hardware mediadecoder; and c) otherwise, activate the first onboard hardware mediadecoder without activating the second onboard hardware media decoder.

It is now disclosed for the first time a method of operating a mediadevice having a low-power onboard hardware media decoder, a high-poweronboard hardware media decoder, an onboard display screen and a deviceport, the method comprising: a) using the low-power hardware onboarddecoder, effecting a first media playback to generate a first videostream; b) presenting the first video stream on the onboard displayscreen; c) in response to a detected coupling event of the device portthat occurs at a time when: i) the low-power onboard hardware mediadecoder is generating the first video stream; and ii) the onboarddisplay screen is presenting the first video stream, commencing a secondmedia playback, using the high-power onboard hardware media decoder, togenerate a second media stream; and d) exporting the second media streamvia the device port.

According to some embodiments, the method further comprises: e) inresponse to the detected coupling event, ceasing the first playback bythe low-power onboard hardware media decoder.

According to some embodiments, the first media playback and thepresentation of the first video stream of step (b) continuessimultaneously with the exporting of the second media stream via thedevice port.

According to some embodiments, the second media playback of step (c) iscarried out in accordance with a media bookmark of the first mediaplayback by the low-power onboard hardware media decoder at a time ofthe device port coupling event.

It is now disclosed for the first time a method of operating a mediadevice having a low-power onboard hardware media decoder and ahigh-power onboard hardware media decoder, an onboard screen and adevice port. The method comprises: a) using the high-power onboardhardware media decoder, generating a first video stream; b) exportingthe first video stream via the device port; c) in response to a detecteddecoupling event of the device port that occurs at a time of theexporting, commencing a second media playback, using the low-poweronboard hardware media decoder, to generate a second media stream; andd) presenting the second video stream on the onboard screen.

According to some embodiments, the second media playback of step (c) iscarried out in accordance with a media bookmark of the high-poweronboard hardware media decoder at a time of the device port decouplingevent.

It is now disclosed for the first time a method of decoding a givendigital content item by a portable media device having a housing, afirst onboard hardware media decoder associated with the device housing,a second onboard hardware media decoder associated with the devicehousing and a media output port mechanically integrated with the devicehousing, the method comprising: a) using the first onboard hardwaremedia decoder associated with the device housing of the portable mediadevice, effecting a first media decoding of the given digital contentitem to generate a first media signal from the given digital contentitem; b) using the second onboard hardware media decoder associated withthe device housing of the portable media device, effecting a secondmedia decoding of the given digital content item to generate a secondmedia signal; and c) exporting at least one of the generated mediasignals via the media output port that is mechanically integrated withthe device housing.

According to some embodiments, i) the method further comprises: d)displaying the first media signal on an onboard display screen that ismechanically integrated with the device housing of the portable mediadevice; ii) the exporting of step (c) includes exporting the secondmedia signal via the media output port; and iii) the method is carriedout so that no output media signal from the first onboard hardware mediadecoder is exported from the portable media device to any externaldevice.

According to some embodiments, the first and second decodings arecarried out such that a ratio between a power consumption of the secondhardware media decoder at a time of the second decoding and a powerconsumption of the first hardware media decoder at a time of the firstdecoding is at least 2.

According to some embodiments, i) the effecting of the second decodingis contingent upon an availability of external power to the portablemedia device via the media output port; and ii) the effecting of thefirst decoding is not contingent upon an availability of any externalpower to the portable media device.

According to some embodiments, i) the first media decoding is a firstvideo decoding so that the first media signal is a first video signal;ii) the second media decoding is a second video decoding so that thesecond media signal is a second video signal; iii) the first and secondvideo decodings are carried out such that at least one video qualityrelation selected from the group consisting of a first video qualityrelation and a second video quality relation is true; and iv) the firstand second video quality relations are defined as follows: A) accordingto the first video quality relation, a ratio between a total number ofpixels of a video image of the first video signal and a total number ofpixels of a video image of the second video signal is at most 1/3 ; andB) according to the second video quality relation, a ratio between acolor depth of a video image of the first video signal and a color depthof video image of the second video signal is at least 1.5.

According to some embodiments, i) the first media decoding is a firstvideo stream decoding so that the first media signal is a first videostream; ii) the second media decoding is a second video stream decodingso that the second media signal is a second video stream; iii) the firstand second video stream decodings are carried out such that a ratiobetween a frame refresh rate of the first video stream and a refreshrate of the second video stream is at most 1/2.

According to some embodiments, i) the first and second media decodingare carried out so that at least one operation condition selected fromthe group consisting of a first operation condition and a secondoperation condition is true; and ii) the first and second operationscondition are defined as follows: A) according to the first operationcondition, the first and second media signals are simultaneouslygenerated from the given digital media content item; and B) according tothe second operation condition, the first and second media signals aregenerated sequentially.

According to some embodiments, i) the first and second media decodingare carried out so that at least one operation condition selected fromthe group consisting of a first operation condition and a secondoperation condition is true; and ii) the first and second operationscondition are defined as follows: A) according to the first operationcondition, at least one of the first media signal and the second mediasignal is a static video signal; and B) according to the secondoperation condition, each of the first and second media signals is astreaming video signal.

According to some embodiments, i) the first media decoding is carriedout so that the first media signal is a first video stream; ii) thesecond media decoding is carried out so that the first media signal is asecond video stream; and iii) the first and second media decodingscarried out so that the first and second video streams are synchronizedplayback streams of the given content item.

According to some embodiments, i) the first media decoding is carriedout so that the first media signal is a first video stream; ii) thesecond media decoding is carried out so that the first media signal is asecond video stream; iii) the method further comprises: d) in accordancewith input received via a user control mechanically integrated with thehousing of the portable media device, determining a video stream timedifference between the first and second playbacks; and iv) the first andsecond media decodings are carried out according to the determined videostream time difference.

According to some embodiments, i) the method further comprises: d)presenting the first media signal on an onboard media presentationdevice mechanically integrated with the device housing; e) detecting aninter-device coupling via the media port at a time when: A) the firstmedia decoding is being carried out by the first onboard media decoderto generate the first media signal from the digital media content item;and B) the onboard display presentation device is presenting the firstmedia signal; ii) the second decoding of the given digital media contentitem by the second hardware media decoder to generate the second mediasignal is commenced in response to the detected inter-device coupling;and iii) the exporting of the second media signal via the media outputport is carried out in response to the detected inter-device coupling.

According to some embodiments, the method further comprises: f) furtherresponding to the inter-device coupling by ceasing at least one of: i)the decoding of the digital content item by the first hardware mediadecoder; and ii) the presenting of the first media signal by the onboardmedia presentation device.

According to some embodiments, the method further comprises: f) afterthe commencing of the second decoding of the given digital content itemby the second hardware media decoder which occurs after the inter-devicecoupling, continuing: i) the first decoding of the digital content itemby the first hardware media decoder; and ii) the presenting of the firstmedia signal by the onboard media presentation device.

According to some embodiments, the commencing of the second decoding ofthe given content item by the second hardware media decoder is carriedout in accordance with a streaming media playback bookmark of the firsthardware media decoder.

According to some embodiments, the first and second media decodings arecarried out to provide at least one of: i) a look-ahead functionality ofthe second media signal relative to the first media signal; ii) alook-back functionality of the second media signal relative to the firstmedia signal; and iii) a flexible time domain of the second media signalrelative to the first media signal.

According to some embodiments, i) the method further comprises: d)detecting a decoupling via the media port that occurs at a time when: A)the second hardware media decoder is effecting the second media decodingof the given digital media content item to generate the second mediasignal from the digital media content item; and B) the media output portis exporting the second media signal, and e) in response to the detecteddecoupling, ceasing the second media decoding of the digital mediacontent item by the second hardware media decoder; and ii) the firstmedia decoding of the given digital media content item by the firsthardware media decoder is commenced in response to the detecteddecoupling.

According to some embodiments, the method further comprises: d)displaying the first media signal on an onboard display mechanicallyintegrated with the device housing; e) detecting a decoupling via themedia port that occurs at a time when: A) the second hardware mediadecoder is effecting the second media decoding of the given digitalmedia content item to generate the second media signal from the digitalmedia content item; B) the media output port is exporting the secondmedia signal, C) the first hardware media decoder is effecting the firstmedia decoding of the given digital media content item to generate thefirst media signal from the digital media content item; and D) the firstmedia signal is display on the onboard display; and f) in response tothe detected decoupling, ceasing the second media decoding of thedigital media content item by the second hardware media decoder; and g)continuing the first media decoding and the displaying of the firstmedia signal after the detecting and after the ceasing.

According to some embodiments, the method further comprises: h) inaccordance with input received via a user control mechanicallyintegrated with the housing of the portable media device, effecting amode transition between any of a first mode, a second mode and a thirdmode, wherein the first, second and third modes are defined as follows:i) when in the first mode, the first hardware media decoder is activeand the second hardware media decoder is dormant; ii) when in the secondmode, the second hardware media decoder is active and the first hardwaremedia decoder is dormant; and iii) when in the third mode, both of thefirst hardware media decoder is active and the second hardware mediadecoder are active.

It is now disclosed for the first time a method of operating a mediadevice having a first onboard hardware media decoder and a secondonboard hardware media decoder, the method comprising: a) determining ifexternal available power is available to the media device; b) if theexternal power is available, activate the second onboard hardware mediadecoder; and c) otherwise, activate the first onboard hardware mediadecoder without activating the second onboard hardware media decoder.

It is now disclosed for the first time a method of operating a mediadevice having a low-power onboard hardware media decoder a high-poweronboard hardware media decoder an onboard display screen and a deviceport the method comprising: a) using the low-power hardware onboarddecoder effecting a first media playback to generate a first videostream; b) presenting the first video stream on the onboard displayscreen; c) in response to a detected coupling event of the device portthat occurs at a time when: i) the low-power onboard hardware mediadecoder is generating the first video stream; and ii) the onboarddisplay screen is presenting the first video stream, commencing a secondmedia playback, using the high-power onboard hardware media decoder, togenerate a second media stream; and d) exporting the second media streamvia the device port.

According to some embodiments, the method further comprises: e) inresponse to the detected coupling event, ceasing the first playback bythe low-power onboard hardware media decoder.

According to some embodiments, the first media playback and thepresentation of the first video stream of step (b) continuessimultaneously with the exporting of the second media stream via thedevice port.

According to some embodiments, the second media playback of step (c) iscarried out in accordance with a media bookmark of the first mediaplayback by the low-power onboard hardware media decoder at a time ofthe device port coupling event.

It is now disclosed for the first time a method of operating a mediadevice having a low-power onboard hardware media decoder and ahigh-power onboard hardware media decoder, an onboard screen and adevice port, the method comprising: a) using the high-power onboardhardware media decoder, generating a first video stream; b) exportingthe first video stream via the device port; c) in response to a detecteddecoupling event of the device port that occurs at a time of theexporting, commencing a second media playback, using the low-poweronboard hardware media decoder, to generate a second media stream; andd) presenting the second video stream on the onboard screen.

According to some embodiments, the second media playback of step (c) iscarried out in accordance with a media bookmark of the high-poweronboard hardware media decoder at a time of the device port decouplingevent.

It is noted that features described above as pertaining to certainembodiments may also be included in other embodiments, unless indicatedto the contrary hereinbelow.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of an exemplary portable media deviceaccording to some embodiments.

FIGS. 2A, 2C, 2D are drawings of an exemplary portable media device whencoupled to an external host presentation device.

FIG. 2B is a drawing of an exemplary portable media device when notcoupled to the external host presentation device.

FIGS. 3A-3B are flowcharts of routines for effecting media decoding(s)in accordance with an availability of external electrical power.

FIG. 4A is a drawing of an exemplary portable media device that providessynchronized media playback functionality.

FIGS. 4B-4C are drawings of an exemplary portable media device thatprovides look-ahead functionality.

FIGS. 5A-5B are flow charts of routines for operating a portable mediadevice in accordance with a detected coupling between the portable mediadevice and an external host presentation device.

FIGS. 6A-6B are flow charts of routines for operating a portable mediadevice in accordance with a detected decoupling of the portable mediadevice from an external host presentation device.

FIG. 7A is a diagram of an ordered sequence of images.

FIGS. 7B-7C illustrate the simultaneous presentation of images of anordered sequence of images both on the onboard display screen and on adisplay screen of an external host presentation device.

DETAILED DESCRIPTION OF EMBODIMENTS

The claims below will be better understood by referring to the presentdetailed description of example embodiments with reference to thefigures. The description, embodiments and figures are not to be taken aslimiting the scope of the claims. It should be understood that not everyfeature of the presently disclosed portable media device and method ofoperating the same is necessary in every implementation. It should alsobe understood that throughout this disclosure, where a process or methodis shown or described, the steps of the method may be performed in anyorder or simultaneously, unless it is clear from the context that onestep depends on another being performed first. As used throughout thisapplication, the word “may” is used in a permissive sense (i.e., meaning“having the potential to’), rather than the mandatory sense (i.e.meaning “must”).

A Brief Discussion of FIG. 1

FIG. 1 is a block diagram of an exemplary portable media device 100 inaccordance with some embodiments. The portable media device 100 of FIG.1 includes (i) a device housing 104; (ii) an onboard storage 116 inwhich a digital media content item 148 (for example, an image file suchas a jpeg file, or an audio file such as an mp3 file, or a movie filesuch as an MPEG file) is stored; (iii) first 124 and second 128 onboardhardware media decoders, each of which is operative to decode digitalmedia content item 148 to generate respective a video (150 or 154)and/or audio (152 or 156) signal; (iv) at least one onboard mediapresentation device 140 (i.e. onboard display screen 140A and/or onboardspeaker 140B) which is operative to ‘present’ at least one media signal(i.e. a video 150 or audio 152 signal) generated by the first 124onboard hardware media decoder; and (v) at least one media port 136 forexporting at least one media signal (i.e. a video 154 or audio 156signal) generated by the second 128 onboard hardware media decoder. Thegenerated media signal(s) (150 and/or 152 and/or 154 and/or 156) may beeither analog and/or digital.

One salient feature of the portable media player 100 of FIG. 1 is thattwo separate hardware media decoders (124 and 128) are operative todecode the same given content item 148. Thus, in different examples,both hardware media decoders are MPEG decoders, or both hardware mediadecoders are mp3 decoders, etc. In the example of FIG. 1, the givencontent item 148 resides in a ‘common’ onboard storage 116 (for example,including flash memory or magnetic storage such as a hard disk) which isaccessible by both onboard hardware media decoders

In some embodiments, the first 124 onboard hardware media decoder is arelatively ‘low end’ hardware media decoder having a relatively ‘low’power consumption and/or operative to produce ‘lower quality’ videowhile the second onboard hardware media decoder 128 is a relatively‘high end” media decoder having a relatively ‘high’ power consumptionand/or operative to produce ‘higher quality’ video. As will be explainedbelow with reference to other figures (for example, FIGS. 3A-3B), thismay be useful for providing a device which: (i) when external power isavailable, generates a relatively ‘high end’ or ‘high quality’ mediasignal(s) (i.e. by second onboard hardware media decoder 128) which isexported via media port(s) 136; and (ii) when external power isunavailable (i.e. when the only source of electrical power is onboardbattery 132), generates a relatively ‘low end’ or ‘low quality’ mediasignal(s) (i.e. by first onboard hardware media decoder 124) which ispresented on one or more of the onboard presentation device(s) 140.

In one non-limiting example, (i) the first 124 onboard hardware mediadecoder generates a so-called 1/4 VGA signal providing images of 320×240pixels, while the second 128 onboard hardware media decoder generates aso-called XGA signal providing images of 1024×658 pixels; and (ii) thefirst 124 onboard hardware media decoder has a power consumption that isonly a fraction (for example, less than half, or less than a quarter) ofthe power consumption of the second 128 onboard hardware media decoder.

In one non-limiting example, a ratio between a power consumption of thesecond onboard hardware media decoder 128 and a power consumption of thefirst onboard hardware media decoder 124 is at least 2.

User control 144 and control circuitry 120 will be discussed below.

A Discussion of FIGS. 2A-2D

FIG. 2A is a drawing of the portable media player 100 when coupled withan ‘external’ host presentation device 160, for example, a ‘large’television device including host-side display screen 168 and host-audiospeaker 172. External host presentation device 160 includes a hostdevice housing 164 and host port 204 (for example, an HDMI socket) whichmay be mechanically integrated into the host housing. In the example ofFIG. 2A, the external screen 168 is ‘significantly larger’ than therelatively ‘small’ onboard screen 140A of portable media player 100.

In the example of FIG. 2A, portable media player 100 is coupled toexternal host presentation device 160 via media port 136 and host port204. Portable media player 100 exports one or more media signals (forexample, ‘high end’ video signal 154 and/or ‘high end’ audio signal 156,each of which may be generated by second onboard hardware media decoder128) to external host presentation device 160 via media port 136 andhost port 204. The exported media signal(s) are received by hostpresentation device 160 and presented on one or more host-side mediadisplay devices 168 (i.e. host-side display screen 168 and/or host-sideaudio speaker 172). In one non-limiting example, the exported mediasignals are ‘streams’ and it is possible to view a ‘movie’ on externalhost presentation device 160.

In the example of FIG. 2A, both the first onboard hardware media decoder124 and the second onboard hardware media decoder 128 are simultaneously‘active’ where (i) the image (i.e. of low end video signal 150)generated by the first onboard hardware media decoder 124 and presentedon onboard screen 140A is of a relative ‘low quality’ (LQ) and (ii) theimage (i.e. of high end video signal 154) generated by the secondonboard hardware media decoder 128 (i.e. of low end video signal 150) anexported to the external host presentation device 160 is of a relatively‘high quality’ (HQ).

In the example of FIG. 2A, media output port 136 is a ‘multi-functionaldevice port’ which is also configured to receive external electricalpower from external host presentation device 160. Thus, as illustratedin FIG. 2A, a media signal (see the left arrow) is exported fromportable media player 100 while external electrical power (see the rightarrow) is simultaneously received into portable media player 100 fromhost presentation device 160. In some embodiments, the received externalelectrical power may be used to power second onboard hardware mediadecoder 128 whose power consumption may be greater, or evensignificantly greater than the power consumption of hardware mediadecoder 124.

It is noted that there is no requirement that media output port 136 is a‘multi-functional device port.’ Alternatively or additionally, aseparate power input port (NOT SHOWN) that is separate from media outputport 136 is provided.

In one non-limiting use case, when the portable media device 100 is notcoupled to external host presentation device 160 (see FIG. 2B): (i) noexternal electrical power is available; (ii) the ‘high-end’ secondhardware media decoder 128 is dormant; and (iii) the ‘low-end’ firsthardware media decoder 124 generates (i.e. using internal electricalpower from onboard battery 132) a ‘low-end’ media signal(s) (150 and/or152) which is presented on an onboard presentation device 140. Whenportable media device 100 is coupled to external host presentationdevice 160 (see FIG. 2A and FIG. 2C): (i) external electrical power isreceived from external host presentation device 160 (for example, viamedia port(s) 136; and (ii) the high-end second hardware media decoder128 generates (i.e. using external electrical power) a ‘high-end’ mediasignal(s) which is exported to external host presentation device 160 viamedia port(s) 136

Although the second media signal(s) (154 and/or 156) which is exportedto external host presentation device 160 and the media signal(s) (150and/or 152) which is presented on the ‘onboard’ presentation device 140are representative of the same digital media content item 148, thesignals, in the current example, are not identical. In the currentexample, first media signal(s) (150 and/or 152) is a relatively‘low-end’ signal(s), while the second media signal(s) (154 and/or 156)is a relatively ‘high-end’ signal(s) with relatively ‘high’ powerrequirements. In one non-limiting use case, this allows a user to viewand/or listen to ‘lower quality’ media content when no external power isavailable (i.e. according to certain quality ‘limitations’) withoutbeing constrained by these quality ‘limitations’ when external power,and an external media presentation device, are available.

In the example of FIG. 2A, both the first onboard hardware media decoder124 and the second onboard hardware media decoder 128 are simultaneously‘active’ to simultaneously generate respective media signals. In theexample of FIG. 2C, only the ‘high end’ media signal (i.e. 154 and/or156) is presented, and no ‘low-end’ signal is generated and/or presentedon the onboard display device 140. Thus, onboard screen 140A isillustrated as a ‘blank screen.’

In the example of FIG. 2A, the image displayed on external hostpresentation device 160 (i.e. which is generated by the second hardwaremedia decoder 128) is a ‘higher quality’ version of the same imagepresented on the onboard display device 140A (i.e. which is generated bythe first hardware media decoder 124). In the example of FIG. 2D,completely different images are displayed.

An Additional Brief Discussion of FIG. 1

It is noted that in the non-limiting example of FIG. 1, the portablemedia device 104 includes exactly one onboard display screen 140A whichis mechanically integrated with the device housing 104—i.e. portablemedia device 104 does not provide multiple display screens.

Furthermore, in the example of FIG. 1, it is noted that the onboardmedia presentation device(s) 140 is operatively coupled to the firstonboard hardware media decoder 124 (i.e. and presents a media stream(s)received from the first onboard hardware media decoder 124) but is notoperatively coupled to the second onboard hardware media decoder 128.For example, if first onboard hardware media decoder 124 generatesrelatively ‘low quality’ video while second onboard hardware mediadecoder 128, then there is no display of the ‘high quality’ video signalon the ‘small’ onboard video screen.

Thus, in the example of FIG. 1, video signal 154 generated by secondonboard hardware media decoder 128 may be exported (for example toexternal host presentation device 160) even if this video signal 154 maynot be displayable on the local onboard display screen 140A.

In some embodiments, as illustrated in FIG. 1, there is no need toexport the ‘low end’ video signal 150, and this ‘low end’ video signalis displayable only on the onboard screen 140A. Thus, in someembodiments, first onboard hardware media decoder 124 is not operativelycoupled to any device port, and no output media signal from the firstonboard hardware media decoder 124 may be exported from the portablemedia device 100 to any external device.

Definitions

For convenience, in the context of the description herein, various termsare presented here. To the extent that definitions are provided,explicitly or implicitly, here or elsewhere in this application, suchdefinitions are understood to be consistent with the usage of thedefined terms by those of skill in the pertinent art(s). Furthermore,such definitions are to be construed in the broadest possible senseconsistent with such usage.

A ‘digital signal processor’ (DSP) is a specialized microprocessordesigned specifically for digital signal processing.

A ‘chipset’ refers to a specialized group of integrated circuits ofchips that are designed to work together, and are often marketed as asingle product or module.

A ‘digital media content item’ refers to a data object (for example, acomputer file(s)) that includes encoded media content—i.e. audio contentand/or encoded video content. Exemplary digital media content itemsinclude but are not limited to .mp3 files, jpeg files, mpeg files, divxfiles, and XviD files.

A ‘media decoder’ refers to a specialized chip or group of chips, or toa software program executable by a microprocessor which enables (i)decompression and/or decoding of audio or video digital media content(for example, received as a bitstream); and at least one of (ii)(a) forthe case of audio content, playback of the audio content to generate ananalog or digital audio stream; (ii)(b) for the case of video content,rendering of the video content to generate one or more analog or digitalimages or frames.

It is noted that the term “video” signal may refer to: (i) an electricalsignal representative of a ‘moving picture’ or ‘movie’—i.e. a video‘stream’; and/or (ii) an electrical signal representative of a ‘stillimage’ or ‘static image’ that is not representative of a ‘movingpicture.’ The video signal may refer to an analog video signal or adigital video signal.

Thus, in one example, a “video decoder” may be operative to generate a“still” or “static” video image. Alternatively or additionally, the“video decoder” may be a “streaming media decoder” operative to generatea video signal that is a ‘video stream’ representative of a movingpicture.

A ‘streaming media decoder’ is a decoder that is decoder that isoperative to effect a video or audio playback to generate a video oraudio stream. A “CODEC” is a device or program capable of encodingand/or decoding a digital data stream or signal. Thus, a ‘streamingmedia decoder’ is a specific type of ‘CODEC.’

One specific type of ‘media decoder’ is a ‘hardware media decoder’ or‘decoder core’ which is a specialized chip or chipset specificallyconfigured to provide the aforementioned ‘media decoder’ functionality.Because the portable media device 100 of FIG. 1 has two separatehardware media decoders, the portable media device 100 of FIG. 1 is a‘dual core’ device.

One example of a commercially available ‘hardware media decoder’ is theVaddis® 888 available from the Zoran Corporation of Haifa, Israel.Another example of a commercially available ‘hardware media decoder’ isthe S5L8700X media decoder chip from the Samsung Group of Seoul, SouthKorea (this second example is an ‘audio decoder’ which generates anaudio signal and does not generate a video signal). Another example of acommercially available ‘hardware media decoder’ the VIA CX700M systemmedia processor, an all-in-one digital media IGP chipset from VIATechnologies, Inc. of Taipei, Taiwan. When a component of portable mediadevice 100 is an “onboard’ component, this refers to a component that is(i) located within device housing 104; and/or (ii) attached to theinside and/or outside of device housing 104.

A “hardware streaming media decoder” (for example, a hardware streamingvideo decoder or a hardware streaming audio decoder) is a hardware mediadecoder that is also a streaming media decoders.

A “media presentation device” refers to a display screen and/or an audiospeaker.

The terms “low end” and “high end” are intended as relative terms, andrefer to the relative quality of the media signal(s) generated by thefirst and second onboard media player.

The terms “low-power onboard hardware media decoder” and “high-poweronboard hardware media decoder” are relative terms, and refer tohardware media decoders where a ratio between power consumption of thehigh-power hardware media decoder and the low-power hardware mediadecoder is at least 2. In some embodiments, this ratio is at least 5.

At a given time, a hardware media decoder (124 or 128) may be ‘active’or ‘dormant.’ When active, the hardware media decoder is decodingencoded media content (for example, as a bitstream 190 or 194) togenerate a video and/or audio media signal. When ‘dormant’ the hardwaremedia decoder is not effecting any decoding. In some embodiments, apower consumption of hardware media decoder when the decoder is“dormant” is not more than 20% of a power consumption of the hardwaremedia decoder when the decoder is “active.”

Control circuitry 120 refers to any combination of hardware (forexample, including a microprocessor and optionally volatile memory suchas RAM or registers), firmware and/or software (for example, computercode which is stored in volatile and/or non-volatile memory and isexecutable by a microprocessor).

In some embodiments, control circuitry 120 provides power regulationfunctionality (for example, see FIGS. 3A-3B and FIGS. 5A-5B, 6A-6B).

In some embodiments, control circuitry 120 is operative to determine arelationship between media content (for example, a sub-portion ofcontent item 148) which is decoded by first hardware media decoder 124and second hardware media decoder 128 for example, see FIGS. 4A-4C,7A-7C.

A Discussion of FIGS. 3A-3B

FIG. 3A is a flow chart of a routine for power management in accordancewith some embodiments. In step S511, a determination for example, bycontrol circuitry 120, is made if external power is available. In theevent that external power is available (see step S515), then the second‘hi-end’ hardware media decoder 128 is activated (for example, bycontrol circuitry 120) in step S523, and the second hardware mediadecoder 128 decodes media content when activated.

In the event that external power is not available, then it is necessaryto rely on the first ‘low-end’ media decoder. Thus, in the event thatexternal power is not available, then the first hardware media decoder124 is activated.

FIG. 3B is another flow chart of a routine for power management inaccordance with some embodiments. The routine of FIG. 3A is similar tothe routine of FIG. 3B, except for the fact that: (i) in step S523 ofFIG. 3A, only the second ‘hi-end’ hardware media decoder 128 isactivated without also activating the first ‘hi-end’ hardware mediadecoder 124; (ii) in step S527 of FIG. 3B, both the first ‘low-end’hardware media decoder 124 and the second ‘hi-end’ hardware mediadecoder 128 are activated.

In one example related to the FIGS. 3A-3B, operation of the secondhardware media decoder 128 is contingent upon an availability ofexternal power, for example, external power received via the mediaoutput port 136.

A Discussion of FIG. 4A-4C

In some embodiments, both first hardware media decoder 124 and secondhardware media decoder 128 are hardware ‘streaming media decoders’operative to effect a playback of a sound digital media (for example, anmp3 file) and/or a ‘movie’ digital media (for example, an MPEG file) togenerate streaming video and/or streaming audio.

Reference is now made to FIG. 4A. In FIG. 4A, the media device 100 isused to playback a movie whose length is 52:08. First hardware mediadecoder 124 and second hardware media decoder 128 operatesimultaneously, to effect simultaneous playbacks. The video output ofthe first hardware media decoder 124 is displayed on the onboard displayscreen 140A, while the output of the second hardware media decoder 124is exported to the host on the onboard display screen 140A.

In the example of FIG. 4A, the first video decoding by the firsthardware media decoder 124 is “synchronized” with the second videodecoding by the first hardware media decoder 128 so that the frameassociated with an elapsed time of 4:57 is displayed simultaneously onboth screens. In one implementation, the control circuitry 120 issues adirective to commence the playback on both media decoderssimultaneously. Alternatively, one of the media decoders commencesplayback, and at a later time a “bookmark” indicative of an “elapsedtime location” within the movie timeline is passed from one of the mediadecoders to the other media decoder by control circuitry 120.

Reference is now made to FIGS. 413-4C. In FIGS. 4B-4C, the media device100 is used to playback the same video clip as in FIG. 4A. Firsthardware media decoder 124 and second hardware media decoder 128 operatesimultaneously, to effect simultaneous playbacks. The video output ofthe first hardware media decoder 124 is displayed on the onboard displayscreen 140A, while the output of the second hardware media decoder 124is exported to the host on the onboard display screen 140A.

In the example of FIG. 4B-4C, the first video decoding by the firsthardware media decoder 124 is “synchronized with a look aheadfunctionality” with the second video decoding by the first hardwaremedia decoder 128—i.e. the rate of playback is the same, but the imagedisplayed on local display screen 140A (i.e. decoded by first hardwaremedia decoder 124) is a “preview” that is 25 seconds ahead of the imagedisplayed on the external screen (i.e. decoded by first hardware mediadecoder 128).

In the example of FIGS. 4B-4C, a “video stream time difference” of 25seconds is provided. In the example of FIG. 4A, a “video stream timedifference” of substantially zero (for example, less than 1 second, orless than half a second) is provided.

In one non-limiting use case, a parent may show the movie to a roomfulof children, who view the movie on the big screen. The “look ahead”functionality allows the parent to “preview” the movie, and if theparent sees inappropriate content on the “small screen” to halt theplayback on the “big screen” before the inappropriate content isdisplayed on the “big screen.”

In one implementation, the “look-ahead’ functionality is provided bycontrol circuitry 120, either without requiring user input, or inaccordance with input received via user control 144 (for example,including one or more buttons or keys or a dial or any other formfactor).

Thus, in embodiments depicted in FIGS. 4B-4C, the first hardware mediadecoder 124 and the second hardware media decoder 128 are operative tosimultaneously effect a playback of the given digital content item 148in a manner such that the second media signal provides a look-aheadfunctionality relative to the first media signal.

Alternatively or additionally, in some embodiments, the first hardwaremedia decoder 124 and the second hardware media decoder 128 may beoperative to simultaneously effect a playback of the given digitalcontent item 148 in a manner such that the second media signal providesa “look-back” functionality relative to the first media signal (notdepicted in the figures). In the latter case, it may be said that thefirst media signal provides a “look-ahead” functionality relative to thesecond media signal.

Alternatively or additionally, the first hardware media decoder 124 andthe second hardware media decoder 128 may simultaneously effect aplayback of the given digital content item 148 in a manner that providesa “flexible time domain” (for example, X2, X4, Freeze image, replay) onthe local screen 140A, without interrupting playback on the largerscreen.

In some embodiments, the “synchronized playback” and/or “look aheadfunctionality” and/or “flexible time domain” is provided in a responseto a coupling between portable media player device 100 and the externalhost presentation device 160.

Although “synchronized” playback, “look ahead functionality” and“flexible time domains” have been explained in terms of video playback,it is appreciated that one or more of these features may be provided foraudio and/or multimedia playback.

A Discussion of FIGS. 5A-5B

FIGS. 5A-5B are flow charts of routines for handling an inter-devicecoupling in accordance with some embodiments. Both FIGS. 5A and 5Binclude steps S201, S205, S209, and S213.

In step S201 of FIGS. 5A and 5B, when the media output port 136 isvacant, and the portable media device 100 is not coupled to the externalhost device 160, the given content item 148 is decoded by first onboardhardware media decoder 124 to generate the first media signals) which ispresented (in step S205 of FIGS. 5A and 5B) on one or more of theonboard media presentation devices 140 (see, for example, FIG. 2B). Instep S209 of FIGS. 5A and 5B, upon coupling between the portable mediadevice 100 and the external host device 160 (for example, via portablemedia port 136 and host port 204), the inter-device coupling isdetected, for example, by control circuitry 120.

In step S213 of FIGS. 5A and 5B, in response to the detected coupling, adecoding of content item 148 by the second onboard hardware mediadecoder 128 to generate the second media signal commences. This secondmedia signal may be exported to the host presentation device 160 andpresented by host presentation device 160.

In one example relating to movies and/or audio content, an indication ofthe first media decoder's 124 “media bookmark” of a “time location”within content item 148 is provided to second media decoder 128 (forexample, by control circuitry 120). In this example, the decoding ofcontent item 148 by the second onboard hardware media decoder 128 (whichcommences in step S213) is carried out in accordance with the “mediabookmark” from the first media decoder. In one example, the playback inaccordance with the bookmark of the first media decoder 124 is carriedout so that the second media decoder 128 commences playback of mediaitem 148 not at the beginning of media item, but at the “bookmarklocation,” thereby allowing the user to “continue viewing” the samemovie and/or “continue listening to” the same audio content item on theexternal device with minimal interruption. Alternatively, this may allowfor a preview of the item.

It is noted that after coupling between the portable media device 100and external host presentation device 160, either: (i) as illustrated inFIG. 2C or FIG. 2D, the decoding of the given content item 148 is haltedor ceased by the first hardware media decoder in step S217A of FIG. 5B(or the decoding continues but the presenting on the local onboardpresentation device 140 ceases in step S217B); or (ii) as illustrated inFIG. 2A, the decoding of the given content item 148 continues by firsthardware media decoder 128 so that a simultaneous decoding of thecontent item 148 and simultaneous presenting of the decoded media isprovided.

A Discussion of FIGS. 6A-6B

FIGS. 6A-6B are flow charts of routines for handling an inter-devicedecoupling in accordance with some embodiments. Both FIGS. 6A and 6Binclude steps S301, S305, S309, and S313.

FIG. 6A refers to the use case where, before the inter-device decoupling(i.e. at the time when the portable media device 100 is coupled to theexternal presentation device 160), only the second (“high-end”) hardwaremedia decoder decodes content item 148, and the first hardware mediadecoder is not decoding content item 148 (see for example, FIG. 2C).

FIG. 6B refers to the use case where, before the inter-device decoupling(i.e. at the time when the portable media device 100 is coupled to theexternal presentation device 160) a simultaneous decoding of the contentitem 148 is provided by both the first 124 and second 128 onboardhardware media decoders (see, for example, FIGS. 2A, 2C and 2D).

In step S301 of FIGS. 6A and 6B, when portable media device 100 iscoupled to external presentation device 160 via media port 136, thegiven content item is decoded by decoder 128 to generate a ‘high mediasignal.’ This media signal is exported in step S305 of FIGS. 6A and 6Bto the external presentation device 160 via media port 136 (see FIG. 2Aor 2C or 2D).

In step S309 of FIGS. 6A and 6B, when the portable media device 100 isdecoupled from the external host device 160 the inter-device decouplingis detected, for example, by control circuitry 120.

In step S313 of FIGS. 6A and 6B, in response to the detected decoupling,a decoding of the content item 148 by the second onboard hardware mediadecoder 128 ceases to “deactivate” second onboard hardware media decoder128. This may be useful, for example to save power when external poweris not available.

As noted above, FIGS. 6A and 6B refer to different use cases.

As for the use case of FIG. 6A, in step S317 of FIG. 6A, in response tothe detected decoupling, the first hardware media decoder 128 commencesthe decoding of the given content item 148 to generate the “first” mediasignal which may be presented

In one implementation of step S317, the decoding of content item 148(for example, a movie or audio file) by the first “low end” mediadecoder 124 commences not from the beginning of the content item 148,but rather in accordance with a bookmark of the playback of the contentitem 148 used by the second “high end” media decoder 128. This may allowthe user to view and/or listen to the content in a manner with minimalinterruption—i.e. the ‘low end” media decoder 124 may “pick up from thelocation where the high end media decoder 128 left off” upon decoupling.

As for the use case of FIG. 6B, it is noted that the routine of FIG. 6Bprovides several steps not provided in the routine of FIG. 6A.

Thus, in the example of FIG. 6B, it is noted that while portable mediadevice 100 is still coupled to the external host presentation device 160(i.e. before the decoupling event): (i) simultaneous with the decodingof content item 148 by the second “high end” hardware media decoder 128,the first “low end” hardware media decoder 124 decodes content item 148to generate the first media signal(s) (150 and/or 152) in step S331; and(ii) simultaneous with the exporting of the “high end” media signal (154and/or 156) of step S305, the “low end” media signal(s) (150 and/or 152)is presented, in step S335, on an onboard media presentation device 140.

In the example of FIG. 6B, after the decoupling between portable mediadevice 100 and external host presentation device 160, in step S339, thedecoding by the “low end” decoder (see step S331) and the presenting ofthe ‘low end” media signal(s) (see step S335) continue.

A Discussion of FIG. 7A

In some embodiments, portable media device 100 is useful for displayingan ordered sequence of images. In one example, the portable media device100 is useful for showing an ordered sequence of slides (for example, ofa Powerpoint® presentation).

FIG. 7A illustrates an ordered sequence of images. In the example ofFIG. 7B, the sequence of images (for example, the slide show) is viewedso that identical slides in the slide sequence are displayedsimultaneously on onboard screen 140A (which receives a video signal 150from first hardware media decoder 124) and external presentation device160 (which receives a video signal 154 from second hardware mediadecoder 128 via media port 136).

In some embodiments, the image displayed is a ‘static image’—i.e. not animage of a ‘movie.’

In the example of FIG. 7C, a “slide look ahead functionality” isprovided so that a “later slide” in the sequence is displayed on onboardscreen 140A while an “earlier slide” displayed simultaneously on theexternal presentation device 160.

This may allow a presented to preview the next slide, while presentingthe current slide on the external presentation device 160.

Additional Comments About FIG. 1

As shown in FIG. 1, portable media device 100 includes onboard displayscreen 140A. In some embodiments, portable media device 100 may includeexactly on onboard display screen 140A. Furthermore, it is noted that insome embodiments, portable media device 100 lacks onboard display screen140A and/or onboard speaker 140B. For example, ‘low end’ video signal150 and/or ‘low end’ audio signal 152 may be exported via one or moremedia port(s).

Although given digital media content item 148 was illustrated in FIG. 1as residing in onboard storage 116, this is not a limitation. In someembodiments, given digital media content item 148 resides in an externalstorage (NOT SHOWN—for example, a USB device or a memory card such as anMMC or SD card) coupled to portable media player via external storageport 112. The external storage may be simultaneously accessible by bothfirst 124 and second 128 onboard media decoders.

Media port(s) 136 may include any appropriate analog and/or digitalmedia port (e.g. plug or socket). Exemplary media ports include but arenot limited to HDMI (High Definition Multi-media interface) plugs,S-video plugs, VGA (Video Graphics Array) ports, audio sockets, andbanana cables.

Different embodiments of the present invention (for example, withreference to FIGS. 3A-3B, 5A-5B, 6A-6B) where one or more hardware mediadecoder (124 and/or 128) is activated or deactivated ‘automatically’ inresponse to a detected event (for example, a coupling or decoupling withexternal host device 160). In some embodiments, user control 144 isconfigured to allow the user to ‘manually’ activate and/or deactivate ahardware media decoder (124 or 128) and/or to switch between ‘modes’where only one of the two hardware media decoders is active and/or whereboth of the two hardware media decoders are active.

A Brief Discussion of Relative Video Quality

As noted earlier, the terms “low end” and “high end” are intended asrelative terms, and refer to the relative quality of the media signal(s)generated by the first and second onboard media player.

In one non-limiting example, the “high quality” video has a highdefinition resolution images of 1320×720 pixels, and a high colorquality (for example, 8 bits per color and three colors).

In different embodiments, the “relative quality” of video of generatedby the first hardware media decoder 124 (in this case a video decoder)and the second hardware media decoder 128 may be characterized by one ofmore of: (i) total number of pixels of the images produced by thedecoder and/or (ii) color depth of the images produce by the decoderand/or (iii) frame refresh rate (property (iii) is limited to streamingvideo decoders).

In one example related to property (i), the first 124 hardware mediadecoder is a hardware video decoder that is operative such that thefirst media signal is a first video signal, the second 128 hardwaremedia decoder is a hardware video decoder that is operative such thatthe second media signal is a second video signal, and a ratio between atotal number of pixels of images of the first video signal and a totalnumber of pixels of images of the second video signal is at most 1/3.

In one example related to property (ii the first 124 hardware mediadecoder is a hardware video decoder that is operative such that thefirst media signal is a first video signal, the second 128 hardwaremedia decoder is a hardware video decoder that is operative such thatthe second media signal is a second video signal, and a ratio between acolor depth of the first video signal and a color depth of the secondvideo signal is at least 1.5. In one example related to property (iii),the first 124 hardware media decoder is a hardware streaming videodecoder that is operative such that the first media signal is a firstvideo stream, the second 128 hardware media decoder is a hardwarestreaming video decoder that is operative such that the second mediasignal is a second video stream, and a ratio between a frame refreshrate of the first video stream and a refresh rate of the second videostream is at most 1/2.

As noted earlier, in some embodiments a user control 144 is provided,for example, for controlling a video stream time difference and/or foreffecting mode transitions between modes where one or both decoders areactive (or dormant) and/or for any other purpose. In some embodiments,user control 144 is mechanically integrated with device housing 104.

Concluding Remarks

It is further noted that any of the embodiments described above mayfurther include receiving, sending or storing instructions and/or datathat implement the operations described above in conjunction with thefigures upon a computer readable medium. Generally speaking, a computerreadable medium may include storage media or memory media such asmagnetic or flash or optical media, e.g. disk or CD-ROM, volatile ornon-volatile media such as RAM, ROM, etc. as well as transmission mediaor signals such as electrical, electromagnetic or digital signalsconveyed via a communication medium such as network and/or wirelesslinks.

Having thus described the foregoing exemplary embodiments it will beapparent to those skilled in the art that various equivalents,alterations, modifications, and improvements thereof are possiblewithout departing from the scope and spirit of the claims as hereafterrecited. In particular, different embodiments may include combinationsof features other than those described herein. Accordingly, the claimsare not limited to the foregoing discussion.

1. A portable media device for decoding a given digital content item,the media device comprising: a device housing; a first onboard hardwaremedia decoder associated with the device housing, the first onboardhardware media decoder operative to decode the given digital contentitem to generate a first media signal; a second onboard hardware mediadecoder associated with the device housing, the second onboard hardwaremedia decoder operative to decode the given digital content item togenerate a second media signal; and a media output port mechanicallyintegrated with the device housing for exporting at least one of thegenerated media signals, wherein, in response to the portable mediadevice being connected to an external host presentation device, thesecond onboard hardware media decoder is configured to decode thedigital content item and generate the second media signal and the mediaoutput port is configured to output the second media signal and, inresponse to the portable media device not being connected to an externalhost presentation device, the second onboard hardware media decoder isconfigured to transition to a dormant state so that the second mediadecoding is not effected and the first onboard hardware media decoder isconfigured to effect the first media decoding using an onboard powersupply to generate the first media signal.
 2. The portable media deviceof claim 1 further comprising: exactly one onboard display screenmechanically integrated with the device housing for displaying the firstmedia signal, wherein: the onboard display screen is operatively coupledto the first onboard hardware media decoder without being operativelycoupled to the second onboard hardware media decoder; and the mediaoutput port is operatively coupled to the second onboard hardware mediadecoder to export the second media signal; and the first onboardhardware media decoder is configured within the portable media devicesuch that no output media signal from the first onboard hardware mediadecoder may be exported from the portable media device to any externaldevice.
 3. The portable media device of claim 1 wherein a ratio betweena power consumption of the second hardware media decoder and a powerconsumption of the first hardware media decoder is at least
 2. 4. Theportable media device of claim 3 further comprising: the onboard powersource for powering the first hardware media decoder wherein: the mediaoutput port is a multi-function port that is also operative forreceiving electrical power; and operation of the second hardware mediadecoder is contingent upon an availability of external power via themedia output port.
 5. The portable media device of claim 1 wherein: thefirst hardware media decoder is a hardware video decoder that isoperative such that the first media signal is a first video signal; thesecond hardware media decoder is a hardware video decoder that isoperative such that the second media signal is a second video signal;and the first and second hardware media decoders are configured suchthat at least one video quality relation selected from the groupconsisting of a first video quality relation and a second video qualityrelation is true; and the first and second video quality relations aredefined as follows: according to the first video quality relation, aratio between a total number of pixels of a video image of the firstvideo signal and a total number of pixels of a video image of the secondvideo signal is at most 1/3; and according to the second video qualityrelation a ratio between a color depth of a video image of the firstvideo signal and a color depth of video image of the second video signalis at least 1.5.
 6. The portable media device of claim 1 wherein: thefirst hardware media decoder is a hardware streaming video decoder thatis operative such that the first media signal is a first video stream;the second hardware media decoder is a hardware streaming video decoderthat is operative such that the second media signal is a second videostream; and a ratio between a frame refresh rate of the first videostream and a refresh rate of the second video stream is at most 1/2. 7.The portable media device of claim 1 wherein: the first and secondhardware media decoders are operative so that at least one operationcondition selected from the group consisting of a first operationcondition is true and a second operation condition is true; and thefirst and second operations condition are defined as follows: accordingto the first operation condition, the first and second hardware mediadecoders are operative to respectively generate the first and secondmedia signals from the given digital media content item simultaneously;and according to the second operation condition, one of the first andsecond hardware media decoders is operative to effect a respectivedecoding at a time when the other of the first and second hardware mediadecoder is dormant.
 8. The portable media device of claim 1 wherein: thefirst and second hardware media decoders are operative so that at leastone operation condition selected from the group consisting of a firstoperation condition is true and a second operation condition is true;and the first and second operations condition are defined as follows:according to the first operation condition, at least one of the firstmedia signal and the second media signal is a static video signal; andaccording to the second operation condition, each of the first hardwaremedia decoder and the second hardware media decoder is a hardwarestreaming media decoder.
 9. The portable media device of claim 1wherein: the first hardware media decoder is a hardware streaming videodecoder that is operative such that the first media signal is a firstvideo stream; the second hardware media decoder is a hardware streamingvideo decoder that is operative such that the second media signal is asecond video stream; and the first hardware media decoder and the secondhardware media decoder are configured to effect the respective decodingsso that the first and second video streams are synchronized playbackstreams of the given content item.
 10. The portable media device ofclaim 1 wherein: the first hardware media decoder is a hardwarestreaming video decoder that is operative such that the first mediasignal is a first video stream; the second hardware media decoder is ahardware streaming video decoder that is operative such that the secondmedia signal is a second video stream; and the device further comprises:a user control for controlling a video stream time difference betweenthe first and second playbacks.
 11. The portable media device of claim 1wherein: the device further comprises: an onboard media presentationdevice mechanically integrated with the device housing; and the secondhardware media decoder and the media output port are configured withinthe portable media device to respond to an inter-device coupling via themedia port that occurs at a time when: the first hardware media decoderis decoding the given digital media content item to generate the firstmedia signal from the digital media content item, and the onboarddisplay presentation device is presenting the first media signal, by:commencing the decoding of the given digital media content item by thesecond hardware media decoder to generate the second media signal; andcommencing the exporting via the media output port of the second mediasignal.
 12. The portable media device of claim 11 wherein the firsthardware media decoder and the onboard media presentation device areconfigured within the portable media device to respond to theinter-device coupling by ceasing at least one of: the decoding of thedigital content item by the first hardware media decoder; and thepresenting of the first media signal by the onboard media presentationdevice.
 13. A portable media device comprising: a device housing; afirst onboard hardware media decoder associated with the device housing,the first onboard hardware media decoder operative to decode the givendigital content item to generate a first media signal; a second onboardhardware media decoder associated with the device housing, the secondonboard hardware media decoder operative to decode the given digitalcontent item to generate a second media signal; a media output portmechanically integrated with the device housing for exporting at leastone of the generated media signals; an onboard media presentation devicemechanically integrated with the device housing; and the second hardwaremedia decoder and the media output port are configured within theportable media device to respond to an inter-device coupling via themedia port that occurs at a time when: the first hardware media decoderis decoding the given digital media content item to generate the firstmedia signal from the digital media content item, and the onboarddisplay presentation device is presenting the first media signal, by:commencing the decoding of the given digital media content item by thesecond hardware media decoder to generate the second media signal; andcommencing the exporting via the media output port of the second mediasignal; wherein the first hardware media decoder and the onboard mediapresentation device are configured within the portable media device tocontinue: the decoding of the digital content item by the first hardwaremedia decoder; and the presenting of the first media signal by theonboard media presentation device after the commencing of the decodingof the given digital content item by the second hardware media decoderwhich occurs after the inter-device coupling.
 14. A portable mediadevice comprising: a device housing; a first onboard hardware mediadecoder associated with the device housing, the first onboard hardwaremedia decoder operative to decode the given digital content item togenerate a first media signal; a second onboard hardware media decoderassociated with the device housing, the second onboard hardware mediadecoder operative to decode the given digital content item to generate asecond media signal; a media output port mechanically integrated withthe device housing for exporting at least one of the generated mediasignals; an onboard media presentation device mechanically integratedwith the device housing; and the second hardware media decoder and themedia output port are configured within the portable media device torespond to an inter-device coupling via the media port that occurs at atime when: the first hardware media decoder is decoding the givendigital media content item to generate the first media signal from thedigital media content item, and the onboard display presentation deviceis presenting the first media signal, by: commencing the decoding of thegiven digital media content item by the second hardware media decoder togenerate the second media signal; commencing the exporting via the mediaoutput port of the second media signal; and wherein the second hardwaremedia decoder is operative to commence the decoding of the given contentitem in accordance with a streaming media playback bookmark of the firsthardware media decoder.
 15. A portable media device for decoding a givendigital content item, the media device comprising: a device housing; afirst onboard hardware media decoder associated with the device housing,the first onboard hardware media decoder operative to decode the givendigital content item to generate a first media signal; a second onboardhardware media decoder associated with the device housing, the secondonboard hardware media decoder operative to decode the given digitalcontent item to generate a second media signal; a media output portmechanically integrated with the device housing for exporting at leastone of the generated media signals; and wherein the first hardware mediadecoder and the second hardware media decoder are operative tosimultaneously effect a playback of the given digital content item in amanner such that the second media signal provides at least one of: alook-ahead functionality relative to the first media signal; a look-backfunctionality relative to the first media signal; and a flexible timedomain relative to the first media signal.
 16. A portable media devicefor decoding a given digital content item, the media device comprising:a device housing; a first onboard hardware media decoder associated withthe device housing, the first onboard hardware media decoder operativeto decode the given digital content item to generate a first mediasignal; a second onboard hardware media decoder associated with thedevice housing, the second onboard hardware media decoder operative todecode the given digital content item to generate a second media signal;a media output port mechanically integrated with the device housing forexporting at least one of the generated media signals; the portablemedia device further comprises: a media presentation device mechanicallyintegrated with the device housing; and the first hardware mediadecoder, the onboard media presentation device, the second hardwaremedia decoder and the media output port are configured within theportable media device to respond to an inter-device decoupling via themedia port that occurs at a time when: by: the second hardware mediadecoder is decoding the given digital media content item to generate thesecond media signal from the digital media content item; and the mediaoutput port is exporting the second media signal, ceasing the decodingof the digital media content item by the second hardware media decoder;and commencing the decoding of the digital media content item by thefirst hardware media decoder to generate the first media signal and thepresenting of the first media signal on the onboard display screen. 17.A portable media device for decoding a given digital content item, themedia device comprising: a device housing; a first onboard hardwaremedia decoder associated with the device housing, the first onboardhardware media decoder operative to decode the given digital contentitem to generate a first media signal; a second onboard hardware mediadecoder associated with the device housing, the second onboard hardwaremedia decoder operative to decode the given digital content item togenerate a second media signal; a media output port mechanicallyintegrated with the device housing for exporting at least one of thegenerated media signals; the portable media device further comprises: anonboard display screen mechanically integrated with the device housing;and the first hardware media decoder , the onboard display screen , thesecond hardware media decoder and the media output port are configuredwithin the portable media device to respond to an inter-devicedecoupling via the media port that occurs at a time when: by: the secondhardware media decoder is decoding the given digital media content itemto generate the second media signal from the digital media content item;the media output port is exporting the second media signal, the firsthardware media decoder is decoding the given digital media content itemto generate the first media signal from the digital media content item;and the onboard display screen is presenting the first media signal,ceasing the second digital media playback of the digital media contentitem by the second hardware media decoder; and continuing the firstdigital media playback of the digital media content item by the firsthardware media decoder to generate the first video stream and thepresenting of the first media on the onboard display screen. 18.portable media device for decoding a given digital content item, themedia device comprising: a device housing; a first onboard hardwaremedia decoder associated with the device housing, the first onboardhardware media decoder operative to decode the given digital contentitem to generate a first media signal; a second onboard hardware mediadecoder associated with the device housing, the second onboard hardwaremedia decoder operative to decode the given digital content item togenerate a second media signal; a media output port mechanicallyintegrated with the device housing for exporting at least one of thegenerated media signals; the portable media device further comprises: auser control for effecting a mode transition between any of a firstmode, a second mode and a third mode; and the first, second and thirdmodes are defined as follows: when in the first mode, the first hardwaremedia decoder is active and the second hardware media decoder isdormant; when in the second mode, the second hardware media decoder isactive and the first hardware media decoder is dormant; and when in thethird mode, both of the first hardware media decoder is active and thesecond hardware media decoder are active.
 19. A portable media devicecomprising: a device housing; a device port located within the devicehousing; a first onboard hardware media decoder located within thedevice housing; a second onboard hardware media decoder located withinthe device housing; control circuitry located within the device housingand operative to: determine whether the device port is connected to anexternal media presentation device; in response to determining that thedevice port is connected to the external media presentation device,activating the second onboard hardware media decoder to effect firstmedia decoding of a given digital content item to generate a first mediasignal and output the first media signal to the external mediapresentation device via the device port; and in response to determiningthat the device port is not connected to the external media presentationdevice, activating the first onboard hardware media decoder withoutactivating the second onboard hardware media decoder such that thesecond onboard hardware media decoder transitions to a dormant state sothat the first media decoding is not effected and the first onboardhardware media decoder is configured to effect second media decoding ofa given digital content item using an onboard power supply to generate asecond media signal.
 20. The portable media device of claim 19 wherein aratio between a power consumption of the second hardware media decoderand a power consumption of the first hardware media decoder is at least2.
 21. The portable media device of claim 19 wherein: the first hardwaremedia decoder is a hardware streaming video decoder that is operative togenerate a first video stream; the second hardware media decoder is ahardware streaming video decoder that is operative to generate a firstvideo stream; and the first and second hardware media decoders areconfigured such that at least one video quality relation selected fromthe group consisting of a first video quality relation, a second videoquality relation and a third video quality relation is true; and thefirst, second and third video quality relations are defined as follows:according to the first video quality relation, a ratio between a totalnumber of pixels of a video image of the first video stream and a totalnumber of pixels of a video image of the second video stream is at most1/3; according to the second video quality relation, a ratio between aframe refresh rate of the first video stream and a refresh rate of thesecond video stream is at most 1/2; and according to the third videoquality relation, a ratio between a color depth of the first videostream and a color depth of the second video stream is at least 1.5.